Difference between revisions of "Sonic the Hedgehog 2 (8-bit) AutoDemo"
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| − | | | + | | title=Sonic the Hedgehog 2 AutoDemo |
| publisher=[[sega:Sega|Sega]] | | publisher=[[sega:Sega|Sega]] | ||
| developer=[[sega:Aspect Co. Ltd|Aspect Co. Ltd]] | | developer=[[sega:Aspect Co. Ltd|Aspect Co. Ltd]] | ||
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| − | '''''Sonic the Hedgehog 2 AutoDemo''''' is a [[sega:Sega Game Gear|Sega Game Gear]] EPROM cartridge demonstrating the then-upcoming ''[[Sonic the Hedgehog 2 (8-bit)|Sonic the Hedgehog 2]]'' | + | The '''''Sonic the Hedgehog 2 AutoDemo''''' is a [[sega:Sega Game Gear|Sega Game Gear]] EPROM cartridge demonstrating the then-upcoming release of ''[[Sonic the Hedgehog 2 (8-bit)|Sonic the Hedgehog 2]]''. It was sent to several magazines worldwide for preview purposes. On July 14, 2014, [[Orengefox]] obtained a copy of the AutoDemo, and the ROM was released to the public in August. |
As the name may suggest, this ''Sonic 2'' AutoDemo is not playable - instead, the demo plays itself, starting with a simplified introduction sequence and title screen (much like the final game), before continuing with Sonic running through an early version of [[Green Hills Zone]] (complete with loop), gliding through a largely empty [[Sky High Zone]], and briefly riding one of [[Underground Zone]]'s mine carts. Following this, a static "Coming Soon" screen appears, and the demo loops from the beginning. | As the name may suggest, this ''Sonic 2'' AutoDemo is not playable - instead, the demo plays itself, starting with a simplified introduction sequence and title screen (much like the final game), before continuing with Sonic running through an early version of [[Green Hills Zone]] (complete with loop), gliding through a largely empty [[Sky High Zone]], and briefly riding one of [[Underground Zone]]'s mine carts. Following this, a static "Coming Soon" screen appears, and the demo loops from the beginning. | ||
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* The title screen has no sound. | * The title screen has no sound. | ||
* The minecart wheel sits above the rail, rather than inside | * The minecart wheel sits above the rail, rather than inside | ||
| − | * The lightning flashes in sky high zone are different, and at times appear to be in the priority plane ( | + | * The lightning flashes in sky high zone are different, and at times appear to be in the priority plane (i.e. in front of the Sonic sprite) |
* The loop in Green Hills zone appears to have larger dimensions than the final | * The loop in Green Hills zone appears to have larger dimensions than the final | ||
| − | * The trees and flowers of Green Hills zone are different | + | * The trees and flowers of Green Hills zone are different |
| − | * The palette of Green Hills zone is different | + | * The palette of Green Hills zone is different |
| + | |||
| + | ==Hacking== | ||
| + | Following release, the ROM was quickly disassembled with control restored to the player. Traversing the stages further reveals a number of hidden and non-functioning objects, such as springs (of which only the vertical types function), spikes and breakable walls, as well as more of the prototype tileset and artwork. | ||
| + | |||
| + | Green Hills Zone is much longer than what is usually shown and almost resembles a completed stage. Underground Zone utilises several tiles unused in the final game, including what is thought to be a tube (similar to those found in ''[[Sonic the Hedgehog (16-bit)|Sonic 1's]]'' [[Green Hill Zone]] and some sort of building. Sky High Zone also has platforms. | ||
| + | |||
==External Links== | ==External Links== | ||
Revision as of 05:30, 21 August 2014
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| Sonic the Hedgehog 2 AutoDemo |
|---|
| System(s): Sega Game Gear |
| Publisher: Sega |
| Developer: Aspect Co. Ltd |
| Genre: Action |
The Sonic the Hedgehog 2 AutoDemo is a Sega Game Gear EPROM cartridge demonstrating the then-upcoming release of Sonic the Hedgehog 2. It was sent to several magazines worldwide for preview purposes. On July 14, 2014, Orengefox obtained a copy of the AutoDemo, and the ROM was released to the public in August.
As the name may suggest, this Sonic 2 AutoDemo is not playable - instead, the demo plays itself, starting with a simplified introduction sequence and title screen (much like the final game), before continuing with Sonic running through an early version of Green Hills Zone (complete with loop), gliding through a largely empty Sky High Zone, and briefly riding one of Underground Zone's mine carts. Following this, a static "Coming Soon" screen appears, and the demo loops from the beginning.
A single music track plays throughout the demo - one not present in the final game. Much is different from the retail release of Sonic 2, most notably the introduction and title screens and the Green Hills Zone tileset. Tails is also completely missing.
Many early screenshots of the game shown during development are thought to originate from this demo - the primary giveaway being that as gameplay is always the same, the ring and time counts at specific points never change. Furthermore as the HUD resets at the start of each of the three sections, Sonic is seen using a hang glider mere seconds into play - in the final game there are no opportunities to use one this early.
Differences
- The SEGA screen is different and plays no "SEGAAA" chant.
- The title screen only features Sonic, who has no animation.
- The title screen has no sound.
- The minecart wheel sits above the rail, rather than inside
- The lightning flashes in sky high zone are different, and at times appear to be in the priority plane (i.e. in front of the Sonic sprite)
- The loop in Green Hills zone appears to have larger dimensions than the final
- The trees and flowers of Green Hills zone are different
- The palette of Green Hills zone is different
Hacking
Following release, the ROM was quickly disassembled with control restored to the player. Traversing the stages further reveals a number of hidden and non-functioning objects, such as springs (of which only the vertical types function), spikes and breakable walls, as well as more of the prototype tileset and artwork.
Green Hills Zone is much longer than what is usually shown and almost resembles a completed stage. Underground Zone utilises several tiles unused in the final game, including what is thought to be a tube (similar to those found in Sonic 1's Green Hill Zone and some sort of building. Sky High Zone also has platforms.